Flerchinger, G.N., Sauer, T.J., & Aiken, R.A., 2003. Effects of crop residue cover and architecture on heat and water transfer at the soil surface. Geoderma 116, 217-233.
Steiner, J.L., 1994. Crop Residue Effect on Water Conservation. In: Unger, P.W. (Ed.), Managing Agricultural Residues. Lewis Publishers, Brushland, TX.
Introduction. Residues of previous crops provide a valuable amount of organic matter that can be used either to restore soil fertility or for external use. A better understanding of the impact of crop residue management on the soil-water-plant system is needed in order to manage agricultural land sustainably. This review focuses on soil physical aspects related to crop residue management, and specifically on the link between soil structure and hydraulic properties and its impact on crop production.
Literature. Conservation practices, including crop residue retention and non-conventional tillage, can enhance soil health by improving aggregate stability. In this case, water infiltration is facilitated, resulting in an increase in plant water availability. Conservation practices, however, do not systematically lead to higher water availability for the plant. The influence of crop residue management on crop production is still unclear; in some cases, crop production is enhanced by residue retention, but in others crop residues can reduce crop yield.
Conclusions. In this review we discuss the diverse and contrasting effects of crop residue management on soil physical properties and crop production under a temperate climate. The review highlights the importance of environmental factors such as soil type and local climatic conditions, highlighting the need to perform field studies on crop residue management and relate them to specific pedo-climatic contexts. Source :Volume 20 (2016) Numéro spécial 1 : AgricultureIsLife
Soil Carbon and Nitrogen Fractions and Crop Yields Affected by Residue Placement and Crop Types Source :http://dx.doi.org/10.1371/journal.pone.0105039
Abstract : Soil labile C and N fractions can change rapidly in response to management practices compared to non-labile fractions. High variability in soil properties in the field, however, results in nonresponse to management practices on these parameters. We evaluated the effects of residue placement (surface application [or simulated no-tillage] and incorporation into the soil [or simulated conventional tillage]) and crop types (spring wheat [Triticum aestivum L.], pea [Pisum sativum L.], and fallow) on crop yields and soil C and N fractions at the 0–20 cm depth within a crop growing season in the greenhouse and the field. Soil C and N fractions were soil organic C (SOC), total N (STN), particulate organic C and N (POC and PON), microbial biomass C and N (MBC and MBN), potential C and N mineralization (PCM and PNM), NH4-N, and NO3-N concentrations. Yields of both wheat and pea varied with residue placement in the greenhouse as well as in the field. In the greenhouse, SOC, PCM, STN, MBN, and NH4-N concentrations were greater in surface placement than incorporation of residue and greater under wheat than pea or fallow. In the field, MBN and NH4-N concentrations were greater in no-tillage than conventional tillage, but the trend reversed for NO3-N. The PNM was greater under pea or fallow than wheat in the greenhouse and the field. Average SOC, POC, MBC, PON, PNM, MBN, and NO3-N concentrations across treatments were higher, but STN, PCM and NH4-N concentrations were lower in the greenhouse than the field. The coefficient of variation for soil parameters ranged from 2.6 to 15.9% in the greenhouse and 8.0 to 36.7% in the field. Although crop yields varied, most soil C and N fractions were greater in surface placement than incorporation of residue and greater under wheat than pea or fallow in the greenhouse than the field within a crop growing season. Short-term management effect on soil C and N fractions were readily obtained with reduced variability under controlled soil and environmental conditions in the greenhouse compared to the field. Changes occurred more in soil labile than non-labile C and N fractions in the greenhouse than the field.
Dr.Shinde,if one desires to study the effect of crop residues on soil,water and air quality, he has to undertake conservation agriculture experimentation with a particular crop rotation and zero or minimum tillage . Generation of sufficient amount of residues in the system, proper nutrient application and water availability(sufficient or limited) are also important considerations.To perceive the effect on water or air quality in the environment one has to go for longterm experiments with a duration 10 years or more.The following references may be consulted for more details.
Meta-analysis of long-term effects of conservation agriculture on maize grain yield under rainfed conditions. Rusinamhodzi et al. Agronomy Sust.Developm. Published online:06 July 2011 Doi 10.1007/s13593-011-0040-2
The effect of conservation agriculture on crop performance,soil quality and potential C emission reduction and C sequestration in contrasting environments in Mexico.by Govaerts,B. et al.
Fourteen years of applying zero and conventional tillage,crop rotation and residue management systems and its effect on physical and chemical soil quality.European.J.Agronomy 30(2009)228-237. doi:10.1016/j.eja.2008.10.005
Meta-analysis of crop responses to conservation agriculture in sub-saharan Africa.
CGIAR Research program on Climate change,agriculture and food security.CCAFS.