Exchangeability of Soil Potassium in the Sand, Silt, and Clay Fractions as Influenced by the Nature of the Complementary Exchangeable Cation

Impact of Mountain Cropping Systems on Soil Properties, Nutrient Availability and Their Carbon Sequestration Potential in Mid-Hills of Himachal Pradesh, India

“…The available nitrogen was estimated by alkaline potassium permanganate method (Subbiah and Asijia, 1956) and available phosphorus by using Olsen's method (Olsen et al, 1954). The available potassium was estimated by ammonium acetate method (Merwin and Peech, 1951). Soil electrical conductivity and pH was determined by 1:2.5 soil: water suspension method (Jackson, 1973).…”

Effect of Rejuvenation Pruning and Nitrogen Levels on Leaf Nutrient Status of Old and Senile Apricot (Prunus armeniaca L.) cv. New Castle Trees

“…Organic carbon was extracted according to the Chromic acid titration method, given by Walkely and Black (1934). The available macronutrient status i.e., N, P and K content of orchard soils were determined according to the standard methods laid down by Subbiah and Asija (1956); Olsen et al, (1954);and Merwin and Peech (1951), accordingly.…”

Sweet Pepper (Capsicum annuum L.) Productivity: Quality and Soil Health in Sub-Temperate Zone of North-Western Himalayas

“…Organic carbon (OC) was determined by method of Walkley and Black (1934). Available N, P and K were determined by methods of Subbiah and Asija (1956), Olsen et al, (1954) and Merwin and Peech (1951), respectively. Microbial count was determined by method given by Subba Rao (1999).…”