Johann HUMER

10 Questions 30 Answers 0 Followers

Questions related from Johann HUMER

Can WHEAT and MAIZE successfully grow on SANDY SOILS and at pH 5 in AFRICA, like Angolas PLATEAUS ?

I am a agricultural adviser in Huambo in Angola, which is said to have the most fertile soil in Angola, what I can't see here really. Wheat and maize were here planted for 2 years and irrigated...

20 July 2022 1,038 11 View

WHEAT; Can it be cultivated well on sandy soil and at pH 5?

Can wheat be cultivated on sandy soil and at pH 5 nearby of one of those many big rivers in Angola Huambo region? A new farmer cleared one of those many unused land, left by former farmers in...

08 July 2022 6,406 3 View

Are Arbuscular mycorrhizae (AM) of importance for Senecio species?

Since 10-20 years there is a significant expansion of Senecio aquaticus (=Jacobaea aquaticus ) and Senecio jacobaea on lesser cultivated grassland in Austria, Swiss and Germany to observe. Could...

07 August 2017 2,711 24 View

Are cathions or anions more resonsible for the biological toxicity of salts?

I think on glyphosate, which is used in different formulations of salts. There are mostly this glyphosate salts used: isopropylamine salt (IPA)diammonium saltdimethylammonium saltethanolamine...

08 July 2017 9,850 2 View

Iodine value and Peroxide value analysis - actual method for oil seeds?

In principle seeds of chia (Salvia hispanica) should be analysed. Which parameters may also be analysed from chia seeds produced in Central Africa for human consume.Can anyone inform or send me on...

24 October 2016 5,446 4 View

UREA foliar spraying: Are there trials with significant positive effects for better crop yields or high agronomic values?

About urea foliar application is told that agricultural breeded plants can use the nitrogen ad hoc and efficiently. But urea is ambivaltent : it is causing also leaf burning by not proper...

19 February 2016 2,740 12 View

Can anybody suggest a method to prove the shear force stability of grassland root swards and how stable are lawn sods against crush resistance?

The method should measure the resistance or shear force from grass roots in grassland, meadows or pastures swards (turf, lawn, greensward, sod) how stable is the sward against heavy erosion...

24 November 2014 5,280 2 View

Is SUBLETHAL between LD50 and LD100?

Is SUBLETHAL a genuine and clear, reproducible scientifically defined term or an imprecise pun / phrase / play of green thinking scientists? Who has and where was the term SUBLETHAL...

01 January 1970 9,465 8 View

Could it be yet simple demonstrated in a vessel, that the rise of CO2 rises also air temperature?

Can in a sole vessel be demonstrated that the air temperature rises when CO2 concentrations rises by sun irridation? Were there yet any trials to test the effect of increasing C02 concentrations...

01 January 1970 4,909 3 View

Is Neonicotinoid seed dressing in the United States of America allowed or not?

Neonicotinoid seed dressings have caused concern world-wide is reported in the 2017 published articel here...

01 January 1970 720 7 View