Annangi Subba Rao

19 Questions 591 Answers 0 Followers

Questions related from Annangi Subba Rao

Can best/good agricultural practices help reduce the use of chemical fertilizers by the farmers?

Best/good agricultural practices can save energy, safeguard environment , save resources and economize on crop production.Fertilizers are costly inputs in agriculture.High rates or excess use of...

22 August 2021 3,206 28 View

Can the nitrogen requirements of cereal crops like rice, wheat and maize be met by applying nano nitrogenous fertilizers?

The nitrogen requirements of the cereal crops like rice, wheat and maize are high, uptake of around 100 kg N to produce 4-5 tonnes grain or 10 to 11 tonnes of total dry matter. Normally the...

25 June 2021 9,855 35 View

How to use Zinc Oxide as an efficient Zinc Fertilizer in crop production?

The most common zinc fertilizer sources are zinc sulphate (ZnSO4.7H2O) with 21-22% Zn and zinc oxide with 50-80% Zn. ZnO is sparingly soluble while zinc sulphate is highly soluble in soil. How to...

09 September 2019 8,593 1 View

Are humic substances,i.e. humic acid and fulvic acid homogeneous entities or composite units?

Organic materials of plant or animal origin on incorporation in soil, decompose in soil due to microbial action and at least 8-10% remain un-decomposed and transform into humus.Overtime soils may...

21 March 2016 1,947 8 View

Will foliar applied amino acids nutritionally benefit the crop plants?

Amino acids are building blocks of proteins.Amino acids are made from carbon skeletons and ammonium derived from soil or fertilizer sources of ammonium and nitrate.Can direct application of small...

15 February 2016 3,005 44 View

What is the best method to estimate nonexchangeable potassium in soil?

The neutral normal ammonium acetate method which essentially extracts the water soluble and exchangeable K in soil is the most common method to estimate plant- available soil K in soil testing...

28 January 2016 1,462 35 View

Are phosphate leaching losses in soil considerable?

In soils normally the erosion losses of soil phosphate -P are considerable and they are monitored.The leaching losses are presumed to be negligible. Under what soil crop conditions the leaching...

11 January 2016 172 20 View

Why is the applied sulphur use efficiency low in different crops?

Sulphur occurs both in inorganic and organic forms in soil .Sulphur is considered as the fourth essential macronutrient required in good amount by crops.Apart from water soluble SO4...

04 January 2016 865 37 View

How can I efficiently utilize legacy (residual ) phosphorus in soil for crop production?

The legacy or residual phosphorus accumulates in soil from previous years of application of fertilizer and manure.As the use efficiency of current year fertilizer P application is...

21 October 2015 7,494 29 View

How can I overcome yield stagnation and improve/double crop yields?

With increasing population in several countries in Asia and Africa,they have to double their crop yields in coming decades.However crop yields have been stagnating in different parts of the world...

12 October 2015 4,360 45 View

How do the current agricultural practices affect the soil environment and health?

Soil and plant health is interrelated with animal/human health. Whatever pollutants and contaminants added incidentally to soil may affect the plant -animal/human system.Advanced machinery and...

08 October 2015 316 10 View

What is the contribution of root exudate organic compounds in mobilization of micronutrients in soil?

Plant roots release as exudates different organic compounds including low molecular organic acids,phytosiderophores,flavonoids compounds/phenolic compounds and enzymes,etc.They induce changes...

30 August 2015 2,039 8 View

What are the amounts of nutrients supplied by canal and ground waters to irrigated field crops?

Canal(river) and ground(well) waters contain variable amounts of plant nutrients . and the number of irrigations given depend on availability of irrigation water, soil ,crop and local weather...

13 July 2015 6,553 24 View

Is it justified to apply micronutrient mixtures as soil or foliar application to crops?

Normally micronutrients are applied to soil or crop based on soil test. But now several micronutrient mixtures are applied to different crops,irrespective of soil test or deficiency in soil .Some...

18 May 2015 9,396 14 View

For reducing the phosphate fertilizer use , can we follow the the replacement of the crop removal of P approach in P fertilization?

Fertilizer P has become a costly in put in recent times and farmers are facing problem in procuring sufficient amount for application to crop as per recommended rates of application. As...

01 January 1970 5,034 19 View

Between biochar and hydrochar, which is better for use in agriculture, for environment and for climate change mitigation?

In the recent past research is going on both biochar and hydrochar. Between the two products which is better for use in agriculture, for environmental safety and climate change mitigation based...

01 January 1970 3,009 4 View

Can low input agriculture systems like organic farming and zero budget natural farming sustain soil and crop productivities?

In the conventional agriculture high crop yields are obtained and soil fertility and productivity are maintained by following improved practices including good seed, irrigation, fertilizer and...

01 January 1970 9,013 16 View

How much fertilizer nitrogen can be reduced in crops and cropping systems by abundantly growing legumes?

Legumes grown in cropping systems as pulse crop, forage crop, green manure , cover crops( inter row crop or after the main crop) can add to soil a substantial nitrogen 50- 200kg N/ha and organic...

01 January 1970 8,357 8 View

Practical ways to increase the nitrogen use efficiency in crops and cropping systems.

Nitrogen fertilizer is a critical input in agriculture for increasing and sustaining crop production .But its use efficiency in crops is low (30-50 per cent).Various agronomic and fertilizer...

01 January 1970 5,218 32 View