B.P. Tripathi and A.H. Harding
Nepal Agricultural Research Council, Regional Agricultural Research Station, Lumle

DOI

ABSTRACT

A field survey from six potential pockets (Ashrang, Bakrang,Gaikhur, Ghairung, Manakamana and Tanglichok) of Gorkha and four (Bhorletar, Dhimire Gaun Shishaghat, and Syaut) of Lamjung district was carried out from May 1997 to June 1997 to assess the micro-nutrients in the leaves of mandarin trees for determining the nutrient management of mandarin orchards. Total of 72 samples from Gorkha and 48 samples from Lamjung district were collected from four different plant types (healthy fruit bearing trees, healthy young non-fruit bearing trees, unhealthy young non-fruit bearing trees) as treatments and replicated three times in each site. Each sample was a composite of 100-150 leaves. Results revealed that among micro-nutrients, iron and copper were medium to high and very high in rating in all sites indicating these two nutrients are sufficient; except Bhorletar, Shishaghat, Ashrang and Ghairung sites, the rest of the sites were low in zinc content; except Syaut, Bhorletar and Manakamana, all the other sites had medium content of manganese,and all the sites except Tanglichowk were deficient in Boron. Therefore, it is necessary to supply different nutrients through external sources in those sites where a particular nutrient is deficient.