Table 1.

The influence of soil amendments on growth, tree vitality, and mortality of Pyrus communis ‘Williams’ Bon Chrétien’ in Year 1.

TreatmentTree vitalityGrowth
SPADPIPnFruit yield/tree (kg)Crown volumeMortality (%)
Control (no amendment)
Molasses pellets42.3ns7.1*4.45ns6.1ns0.68ns0
BOOST Organic granular49.9*8.2*4.56ns6.8*0.77*0
BOOST Organic granular + biochar50.8*10.0*4.66ns7.2*0.88*0
BOOST Organic granular + molasses pellets47.9*7.4*4.38ns6.7*0.72*0
Molasses pellets + biochar47.1*9.4*4.61ns7.0*0.81*0
BOOST Organic granular + molasses pellets + biochar50.3*11.1*4.50ns6.8*0.76*0
  • Notes: All values mean of surviving trees from an initial number of 10. Asterisk (*) = significant differences between means (P = 0.05). P < 0.05 are considered significant based on Tukey’s Honestly Significant Difference test. SPAD = estimated leaf chlorophyll content, PI = chlorophyll fluorescence, Pn = light-induced CO2 fixation.