Effect of potassium on soil conservation and productivity of maize/cowpea based crop rotations in the north-west Indian Himalayas

Autor: Kuldeep Singh Dadhwal, Prasant Kumar Mishra, B.N. Ghosh, Om Pal Singh Khola, Ranjan Bhattacharyya
Rok vydání: 2016
Předmět:
Zdroj: Journal of Mountain Science. 13:754-762
ISSN: 1993-0321
1672-6316
DOI: 10.1007/s11629-013-2885-0
Popis: Plots under conservation tillage may require higher amount of potassium (K) application for augmenting productivity due to its stratification in upper soil layers, thereby reducing K supplying capacity in a medium or long-term period. To test this hypothesis, a field experiment was performed in 2002-2003 and 2006-2007 to study the effect of K and several crop rotations on yield, water productivity, carbon sequestration, grain quality, soil K status and economic benefits derived in maize (Zea mays L)/cowpea (Vigna sinensis L.) based cropping system under minimum tillage (MT).All crops recorded higher grain yield with a higher dose of K (120 kg K2O ha-1) than recommended K (40 kg K2O ha-1). The five years’ average yield data showed that higher K application (120 kg K2O ha-1) produced 16.4% (P
Databáze: OpenAIRE